Lookin' good for propellant loading...
Jul. 23rd, 2008 06:51 pmOne of the critical phases of a Baikonur launch campaign involves filling the propellant tanks of the spacecraft. Now, when the average person hears the word "propellant," he or she might think "propellant" is the same thing, more or less, as "fuel" (as in gasoline for your car). However, to do its thing, the energy bound up in a fuel needs to be released, and the best way to do that is to get a reaction going with oxygen. On earth, this is not much of a problem, as we are sitting in an atmosphere that is about 20% oxygen (effectively an unlimited supply), so about the only thing you need to worry about to "go" is, indeed, fuel.
In space, however, there's no air, so you have to bring your oxygen source with you. Thus, "propellant" comprises both "fuel" and a source of oxygen, called "oxidizer." Mix the two - and you don't have to do much else except place them in physical contact with each other - and it goes whooosshhhh!!! If you figure out a way to do it smoothly, you get a nice, even outpouring of enormous quantities of energy.
Anyway, without getting into the details of the matter, there were some circumstances that raised some concerns regarding the timely start of propellant loading. They were serious enough to delay the process, by only by an amount of time that had been previously made up by the efficient work of the whole campaign team, so the net result is, well, being about where we're supposed to be. We start oxidizer loading tomorrow, and the van will be by to pick us up at 7 am.
Victor called a little while ago. Apparently, some documents that we had received earlier in the day represented only the first part of the full complement of documents we were to have dealth with, and that additional pages are arriving as I type these words. He tells me there will be 5-6 pages that will require translation ASAP.
Another call just came through. The file has been received. I'm "on."
Cheers...
In space, however, there's no air, so you have to bring your oxygen source with you. Thus, "propellant" comprises both "fuel" and a source of oxygen, called "oxidizer." Mix the two - and you don't have to do much else except place them in physical contact with each other - and it goes whooosshhhh!!! If you figure out a way to do it smoothly, you get a nice, even outpouring of enormous quantities of energy.
Anyway, without getting into the details of the matter, there were some circumstances that raised some concerns regarding the timely start of propellant loading. They were serious enough to delay the process, by only by an amount of time that had been previously made up by the efficient work of the whole campaign team, so the net result is, well, being about where we're supposed to be. We start oxidizer loading tomorrow, and the van will be by to pick us up at 7 am.
Victor called a little while ago. Apparently, some documents that we had received earlier in the day represented only the first part of the full complement of documents we were to have dealth with, and that additional pages are arriving as I type these words. He tells me there will be 5-6 pages that will require translation ASAP.
Another call just came through. The file has been received. I'm "on."
Cheers...